Details of Elean Plume Plotter

This page should be read in conjunction with How Plume Plotter Works. It provides more details specific to the Elean version of Plume Plotter.

Stacks and buildings

Building measurements are taken from the planning application. This image shows the layout of the stack and buildings modelled. North is at the top; colours and numbers indicate the height of the buildings and the stack.

Stack measurements

Most of these details were supplied by the Environment Agency:

Stack location: 52.398104,0.13120889.
Stack height: 43.5 m.
Stack diameter: 1.64 m.
Stack gas exit velocity: 23.3 m/s.
Stack gas temperature: 139.85 °C.

The following values are used for albedo, Bowen ratio and roughness length:

Albedo: 0.2.
Bowen ratio: 1.
Roughness length: 0.3.

Emissions

The emission rates of pollutants are the actual emission rates for 2015, taken from the National Atmospheric Emissions Inventory. They are listed below:

Pollutant	Emission rate per second
Carbon dioxide	44.08 g
Carbon monoxide	34.47 g
Sulphur dioxide	6.837 g
Oxides of nitrogen	6.725 g
Hydrogen chloride	764.5 mg
VOCs	211.3 mg
PM10	541.7 mg
PM2.5	464.9 mg
PM1	190.2 mg
PM0.1	52.57 mg
Lead	1.753 mg
Zinc	1.608 mg
Copper	160.8 μg
Nickel	160.8 μg
Chromium	160.8 μg
Arsenic	16.08 μg
Cadmium	16.08 μg
Mercury	15.79 μg
Dioxins	840.3 pg

Background levels

The background levels of pollutants are taken from a recent air quality assessment for a planned incinerator at Waterbeach:

Pollutant	Background concentration per m³
Carbon dioxide	N/A
Carbon monoxide	N/A
Sulphur dioxide	N/A
Oxides of nitrogen	15.08 μg
Hydrogen chloride	N/A
VOCs	N/A
PM10	N/A
PM2.5	N/A
PM1	N/A
PM0.1	N/A
Lead	N/A
Zinc	N/A
Copper	N/A
Nickel	N/A
Chromium	N/A
Arsenic	N/A
Cadmium	N/A
Mercury	N/A
Dioxins	N/A

Weather data

Weather data is taken from METAR reports from a local airport: RAF Lakenheath.